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Bimetallic MOF-Derived Sulfides with Heterojunction Interfaces Synthesized for Photocatalytic Hydrogen Evolution
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-07-22 , DOI: 10.1021/acs.iecr.1c01838
Changfei Liu 1 , Yaoyao Liu 1 , Zhonghua Xiang 1 , Dahuan Liu 1 , Qingyuan Yang 1
Affiliation  

The synthesis of highly efficient and stable CdS composites without noble metals has become a hotspot in the photocatalytic field. Although NiS is an ideal candidate, it remains a challenge to optimize the combination of NiS and CdS to improve the photocatalytic activity for hydrogen evolution. Herein, we have successfully synthesized a CdS@NiS photocatalyst using bimetallic metal–organic frameworks (MOFs) as the precursor. The formation of bimetallic Cd/Ni-MOFs can lead to well-contacted heterogeneous interfaces between CdS and NiS at the nanoscale, efficiently promoting the separation of photogenerated carriers and boosting electron interface transfer. The obtained results demonstrated that CdS@NiS exhibits a high photocatalytic hydrogen evolution rate of 42.7 mmol·g–1·h–1, and the corresponding apparent quantum yield reaches 13.23% at 450 nm, superior to those obtained using the traditional simple physical mixing methods. This work provides a promising strategy for the design of new photocatalysts for hydrogen evolution.

中文翻译:

合成异质结界面的双金属 MOF 衍生硫化物用于光催化析氢

不含贵金属的高效稳定CdS复合材料的合成已成为光催化领域的热点。尽管 NiS 是理想的候选者,但优化 NiS 和 CdS 的组合以提高析氢的光催化活性仍然是一个挑战。在此,我们成功地合成了一种以双金属金属有机骨架(MOFs)为前驱体的 CdS@NiS 光催化剂。双金属 Cd/Ni-MOFs 的形成可以在纳米尺度上导致 CdS 和 NiS 之间接触良好的异质界面,有效促进光生载流子的分离并促进电子界面转移。所得结果表明CdS@NiS具有42.7 mmol·g –1 ·h –1的高光催化析氢速率,相应的表观量子产率在 450 nm 处达到 13.23%,优于使用传统简单物理混合方法获得的那些。这项工作为设计用于析氢的新型光催化剂提供了一种有前景的策略。
更新日期:2021-08-04
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